Relative heat flow demonstrator



May 15, 1956 F. s. GOMBERT RELATIVE HEAT mow DEMONSTRATOR 2 Sheets-Sheet 1 Filed Aug. 4, 1955 INVENTOE fizeozmcu. 5120mm TTOB NEY May 15, 1956 F. S. GOMBERT RELATIVE HEAT FLOW DEMONSTRATOR Filed Aug. 4, 1953 2 Sheets-Sheet 2 mulll I Fl'zzozmca. S-QOMBERT IIBYW Qmm mun , 2,745,195 Patented May is, 1956 United 2,74 1 Y RELATIVE HEAT stow D MONSTRATOR Frederick S. Gornbert, Indianaptilis, Ind., assignor to Hall- Neal Furnace Company, Indianapolis,'Irid.

Application August 1953, Serial 372,295 1 Claim. cl.3s 50 structure wherein there is an immediate visual indica tion for comparative purposes to'show the relative diflerence between use of fin radiation and non-fin'radiation in a heating device such as in a warm or hot airheating furnace as is commonly used in heating dwellings and the like. The demonstrator is' carried about in a p'ort-. able form so that it'may be available to show toprosp'eetive customers of a furnace and demonstrate the advisability of employing fin radiation. i

A further important object of the invention is to employ a very simple structure utilizing an electric lamp as the heat source anda pair of thermometers in conjunction with a sheet metal housing divided into two compartments, each compartment equally receiving heat from the lamp, one compartment employing the fin and at least a sufficient distance to receive a lamp '16 therein with the upperend'of the lamp being below the top edge-'of'fliehousing 10. This lamp 16 is of a type generally known asv a refrigerator type lamp,- and has a: filament 17 supported to be within a horizontal plane approximately, and is approximately circular in shape,

or at least extends circumferentially around inside of the lamp a distanc e approaching a circle.

Ap'air of plates 18 and 19 are fixed to the side walls of the housing 10 and interiorly thereof, to be in a median plane and to have opposing edges and 2 1 relatively closely conforming to" the contour of the lampf 16 so thatthe lamp" 16' may be entered down between those p1ates18 and 19 to havesubstantially half of the'lamp on'oneside of the plane of those plates, and

the other half on the opposite side. 'The upper edges of these plates 18 and 19 terminate a distance slightly above the diameter of the bulbous portio'nof the lamp 5 1 6.- The' socket is rotatably adjusted around on the the filament 17 will have an equal portion on each side radiation, and the other compartment not having; the fin radiation. The cost of the construction is relatively small, yet the demonstration is exceedingly convincing.

These and many other objects and advantages of the invention will become apparent to those versed in the art in the following description of one particular form of the invention in which Fig. 1 is a view in front elevation of a device employing the invention;

Fig. 2 is a view in top plan;

Fig. 3 is a view in top perspective of a cover for the device; 3

Fig. 4 is a view in vertical section on the line 4-4 in Fig. 2;

Fig. 5 is a view in top plan with the cover removed;

Fig. 6 is a view in central vertical section on the line 66 in Fig. 5; and

Fig. 7 is a detail in vertical section on theline 77 in Fig. 4.

A generally rectangular housing 10 is formed to be open across its top side, and to have several air intake openings at the lower end thereof, these openings herein being shown as triangular cut outs 11 in the front, rear, and side walls of the housing.

The housing 10 has a strap 12 fixed centrally across the interior thereof, and this strap 12 has a sufiicient width to receive a compression socket base 13 therethrough and thereagainst. This socket 13 is of standard construction, comprising a body 14 with a base cap 15 strap 12 to bring the lamp' 16 into that position whereby ofthe plane'of the plates 18 and 19. d

The upper end portions of the plates 18 and 19 each carry a lip 22, Fig. 7,spaced from the face of the plate substantial contact with the upper end portion of the lamp I6.- The gate 23 along with the plates 18 and 19 forms an effective partition vertically and centrally through the housing 10. The upper edge 24 of the gate 23 terminates at the upper edges of the housing 10.

On one side at least of this central partition, there is a spring-like tongue 26 secured to the wall of the housing andnormally projecting inwardly and downwardly from that wallgherein shown as a wall 27, Fig. 6. ,v .A fin radiator is built up following the construction as shown in Patent No. 2,644,225 and has those dimen sions which will permit the radiator generally designated by thenumeral 28 to be inserted 'down into the housing 10 on one side of the gate 23. The radiator 28 is pushed downwardly until its lower end rests on the strap 12, Figs. 5 and 6, and the inner ends of the fins 29 rest in intimate contact with the lamp 16, at the major diameter portion of the lamp.

As indicated this radiator 28 is made up out of an enclosing outer wall 30 from which extend the fins 29, and between the adjacent fins 29 there is a vertical flue or channel provided. The tongue 26 compresses against the wall 30 to carry the radiator into the position of fin contact with the lamp 16, so that heat generated by the lamp 16 can be conducted in part from the radiator side to those fins 29. As is to be noted in Fig. 6, the actual contact between the fins and the lamp 16 is very slight due to the curvature of the lamp.

A cover as indicated in Fig. 3 is made to fit over they upper end of the housing 10, this cover having a major enclosing plate 32 with a downturned flange 33 extending therearound so that the flange may frictionally fit over the upper marginal end portions of the side walls of the housing 10, Fig. 4, and be retained thereover. The plate 32 has a pair of rectangular flues 34 and 35 extending upwardly therefrom, and opening through the plate 32. These flues 34 and 35 are spaced apart one from the other so that they will have their under openings one on each side of the gate 23. At the lower end of each flue 34 and 35, there is a tongue 36 and 37 respectively extending horizontally out from the under side of the plate 32 a short distance. In each of these flues 34 and 35 there is placed a thermometer 38 and 39 respectively to have the lower end of the thermometer in each instance rest on the tongues 36 and 37 and rest in an inclined manner as indicated particularly in Fig. 4

across the upper outeredge 38 of the flue 36 and edge 39 of the flue 35. These thermometers will block of a considerable cross sectional area of each of the flues,

Y t the w l y qs fi e .clfi aa t P mi air o qfifiit h h the fiv s wun fihe th rmom rs; and particularly through V openings 40 in ea h of, the; ther mometers adjacent the bulbs 41f A l 1 I When the lamp 16is energized, heat from the filament 17 will cause upcurrents of air on each sideof the plates 18, 19, and the gate 23, tofiow through the housing '10 and out through the respectiye fiues 34 and 35. After t l-reheat flows have been established, in ashort interval of time, the thermometers 38 and 39 will begin to register a difference inftemperature,thethermorneterjfi on the fin side of the lamp 16 beginning to show higher indications of ternperature than does the other thermometer 38. The thermometers will finally come to indicate as much as from 20 to 22'degrees F; differencebetween the two air flows, that is the higher temperature will be registered on the fin side of the lamp 16. This will happen in spite of the fact that many ofthe passages upwardly through the radiator 28 between the fins 29 will be block off on the under sides by reason-of those fins resting on the strap 12. Normallyin afurnace. the fins 29 will be in contact with thefire dome or combustion chamber throughout the lengths offinsQ To replace the lamp 16, all thathas'to be done is to remove the cover, lift the gate 23, and then unscrew the lamp 16 from its socket 13 and put in anew one as desired. The gate 23 may then again be lowered and the cover replaced over the housing 10 and the demonstrator is ready for use again with the thermometers 38 and 39 put into position in' their respective fiues 34 and 35. Incidently, these thermometers 38 and 39 are simply loosely placed within the flues so that they may be removed for convenience in carrying the demonstrator about.

Thus it is to be seen that I have devised an exceed-i particular form, it is obvious that structural changes may e aa e eq w h??? d par r mfih spisit ttthe invention, and I therefore do not desire to be limited to that precise form beyond the limitations which may be imposed by the following claim.

I claim:

A heat flow comparator comprising a housing open at its top and having lateral openings in the lower end portions of its sides; a heating member centrally mounted within the housing above said lateral openings and spaced from the sides of the housing; a centrally, vertically disposed partition across said housing cut out to extend in close proximity to and in substantially a common plane across and down the sides of said heating member; said partition being in two parts, one part being fixed stationary around a lower portion of the heating member, and the other part being removably positioned across the upper portion of that member; a fin radiator com- I pressibly held with fin ends against said heating member ingly simple yet most efiective means for demonstrating 40 the differences in heat transmitted through air flow columns from a heat source having one portion thereof fin radiated and the other side non-fin radiated. While I have herein shown and described the device in the one on one side of said partition and defining vertical air flows along said member; a cover engaging the upper. end. of the housing and bearing acrosssaid partition other part, retaining that other part in position; a-,pair of stub fiues, each of rectangular and equal cross-section carried by and extending vertically from said cover, one flue opening through the cover on each side of said partition; each flue opening having a thermometer supporting ledge entering therein from common sides; and a thermometer having a back of a width approaching the width of said flues and resting by a lower end .on said ledge and inclined therefrom to rest on the opposite. upper side of said fiue in each instance; said thermometer back in each instance carrying a bulb exposed through an opening in the back within thefiue, and from which bulb a thermometer column extends up along the top side of the back. Y

References Cited in the file of this patent UNITED STATES PATENTS 1,488,699 Neal Apr. 1, 1924 2,272,245 Kuck Feb. 10, 1942 2,326,194 Barton Aug. 10, 1943 

